I am looking at a built gsr block, that i'd like to drop in my LS(kind of reverse LS/VTEC). I know i wouldn't use the benifits of a block built to rev high, but is there any problems with fitment or performance when using a gsr block with an ls head? Someone said the quench areas on the LS head are too small, but I don't think that makes sense. Thanks!

 

i remember someone saying it wont fit maybe im wrong. my guess itlll be slower than a ls ahha

 

If you do this you are gona run into the dowel pin issue so bascly for the head to fit the block you would have to get the holes on the block machined..

Adi

 

lots of ppl talked about doing this with the LS head on b16 block a while back...


go search for it...i think there was soem good info in that thread

 

Thanks, i searched some, but didn't find anything close to what i was looking for. I'll dig a little deeper.

 

i looked too...and can't find it

i'll look a little more

 

there's no point in doing this. why would you want to put an ls head on a gsr block? you're gonna make about as much power as a SOHC motor!! maybe even less!! plus you'll have oil leak issues and you'll eventually ruin the block.

 

if you've done an LS/vtec...you might as well save te parts and make another engine

theres no point in NOT doing it

 

Shermanyang, thanks for your reply, i learned nothing from it. Why would i have oil leak issues? And what if i am getting a great deal on a GSR block...

EDIT: and why would i loose power? do you know what your talking about?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRswapandslow &raquo;</TD></TR><TR><TD CLASS="quote">lots of ppl talked about doing this with the LS head on b16 block a while back...


go search for it...i think there was some good info in that thread</TD></TR></TABLE>

hahah that is my project.... ( stop laughing at me ) LOL
here is the link. I need a LS head. B16 block was from a 1st gen B16a1 so it should still me good.
https://honda-tech.com/zerothread?id=533269

I honestly would not to that GSR block with a LS head mainly because you won't get anything good out it. The reason why i'm doing this is because B16 block and LS head are dirt cheap. Also the b16 has a great r/s ratio. So if i get some turbo cams in it this would be a phunky little MINI LS motor reving to 10k with a blower.

Or it can be a 1.6 LS motor with some 62404 cams... should me a fun little motor to mess around with.

the only problem that I can't seem to calculate is what the compression will be with a stock B16 bottom end and a stock LS head.

 

you can put a LS head on a GSR block.

I imagen that you are only doing this because you are getting a good deal in it at the same time you LS block is getting high on the miles and you just simply want to swap out the block. You will make less torque and as for hp.... i'm not sure if you would gain or loose with a stock LS head. If you were going to stay with the non-vtec route I would get some 62403 cams atleast.

 

okay...must i explain...it is possible but you are going to waste a perfectly good block. not only that...the LS head has horrible air flow compared to the b16/b18c heads. have you ever driven a DOHC V-TEC car with the vtec disabled? that's what it'll feel like except slower. the LS motor makes most of it's power because of it's longer stroke. not only that, the Vtec blocks have oil holes that you'll either have to tap and plug or weld shut which will ruin the block. secondly the ls head has larger dowel pin openings, so you'll need to figure out a way to align the head with the block without screwing either one up.

like i have stated before, it's virtually pointless to waste a perfectly good b18c1 block on a V-tec/LS conversion. if you're really serious about doing this, i'll trade you my spare LS block for that GS-R block so you can have a fully functional LS.

 

Thanks for the info shermanyang. I keep getting different answers but you sound pretty informed, so i'll believe what you said. Let me explain my situation, i'm looking at a gsr block with GE 81mm sleeves, JE 9:1, pauter rods, and block gaurd. So no, i wont trade the gsr block for your LS block. But if you are sure i'll have those issues, i'll pass this up and go with a different LS block with a similar(eagle rods) setup. I think you now see why i wanted this to fit (not that i'm hating on the eagles or anything).

Also in response to your post, VTEC heads are slower without VTEC engaging because they are running on a low RPM cam timing at high RPMs. I'm pretty sure the LS and GSR heads flow very similarly(disregarding VTEC and cams). Anyway, i'm not worried about airflow, i can just up the boost. I would think i could just put a bolt or something in those oil holes and how would a ls/vtec bolt up if your are putting on a head with smaller dowel pin openings? Sorry, i'm not trying to flame you or anything (i may be completely wrong), just having a discussion.

EDIT: Charley Moua, your compression ratio would be 9.739:1 (Source: http://www.c-speedracing.com/h...c.php) Good luck with your project.

 

yeah the flow difference from LS to GSR heads are not night and day differnce. Sure GSR heads flow better but not that drastically better.

BTW how the **** did you calculate that on C-speed?

 

There is a big flow difference between LS and VTEC heads. The LS head dies at the point the VTEC heads come alive, 6K.

The engine you propose to build is just a big ZC, and nothing more.

All that said, I *like* LS's. Throw some boost at it, have some fun, call it a day.

 

Charlie, i just entered the info in and clicked calculate. It tells u the compresion.

I dont see how this would be like a ZC, i mean, its a 1.797 liter motor with a 9.4:1 ccompression ratio. How is that a ZC? It seems more like nothing to do with a ZC to me.

 

confucious say, have gsr block, put gsr head on block, make lots of powa.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lazerus &raquo;</TD></TR><TR><TD CLASS="quote">confucious say, have gsr block, put gsr head on block, make lots of powa.</TD></TR></TABLE>

I'm not doubting this is true. But the function of VTEC is to allow more air into the motor. I can just up the boost and create the same end result (SLIGHTLY less efficent). This is very effective on all motor, but can be replaced with forced induction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Charlie Moua &raquo;</TD></TR><TR><TD CLASS="quote">yeah the flow difference from LS to GSR heads are not night and day differnce. Sure GSR heads flow better but not that drastically better.
</TD></TR></TABLE>

Can you post where you got this information or post the flow charts.

 

If you can't see how it's just a big ZC, I give up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">If you can't see how it's just a big ZC, I give up.</TD></TR></TABLE>

Heh, i thought you said it was just a ZC, i missed the big part. But anyway, its just an average non-vtec motor.

 

[QUOTE=Charlie Moua]yeah the flow difference from LS to GSR heads are not night and day differnce. Sure GSR heads flow better but not that drastically better.
QUOTE]

the difference in flow with the gsr head and ls heads ARE night and day. Port designs are different if you've ever looked at them side by side. why do you think LS motors start choke'n at higher rpms/power levels? it's cause the ls head has poor intake/exhaust port designs. i'll try to show you guys when i have the time, i'll bolt my stock LS head on to my current setup and dyno it. oh my current head i've ported and polished the intake/exhaust ports to match my buddy's JG head. i had his next to mine and tried to make my ports exactly like his. i did notice the difference when i took the stock head off and bolted the ported head on when i was breaking in the motor. anyway, not flaming anyone...just informing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lazerus &raquo;</TD></TR><TR><TD CLASS="quote">confucious say, have gsr block, put gsr head on block, make lots of powa.</TD></TR></TABLE>
confucious said that? he is one smart man

 

well it was my understanding that the LS head and vtec heads are about the same as in flow#. Yeah there is a difference but not worth more than 10whp or so. take for example if the GSR head was the casting and shape of an LS head, but had all the goodies like cams and such.... the only difference would be about 10whp'ish or so... not a night a day difference.

Hum this is getting interesting bro... more info please.

 

ls head and gsr block is a basic zc swap,your just wasting your time.go with the finer things in life,find a v-tec head